电液控制的主动横向稳定杆的应用仿真研究

为了改善商用车的侧倾稳定性,设计了一种集液压控制与电机控制的优势于一体,具有较高控制精度和较大反侧倾力矩的电液控制主动横向稳定杆,并以某19座商用车为例,建立了包含转向、俯仰、侧倾,车身垂向运动在内的九自由度整车模型,对其中的主动横向稳定杆设计了一种PID+前馈的控制策略以提高控制精度,减少迟滞,并通过Simulink和Trucksim的联合仿真以验证其有效性。在附着系数为0.8的B级路面上,分别进行鱼钩、方向盘角阶跃和双移线三种不同的工况下的仿真。结果表明,与被动稳定杆相比,提出的这种主动稳定杆能够让车身侧倾角,横摆角速度,侧向加速度和质心侧偏角均有(20~45)%的降低,极大的提高了车辆的侧翻稳定性。

Simulation Study on Application of Electro-Hydraulic Control Active Lateral Stabilizer Bar

In order to improve the roll stability of commercial vehicles,an electro-hydraulic control active lateral stabilizer with high control accuracy and large reverse roll torque is designed,which integrates the advantages of hydraulic control and motor control.Taking a 19-seat commercial vehicle in Iveco as an example,a nine-degree-of-freedom vehicle model including steering,pitching,roll and vertical motion of the body is established.A PID+feedforward control strategy is designed for the active transverse stabilizer to improve the control accuracy and reduce the hysteresis.Simulink and Trucksim joint simulation is used to validate the proposed control strategy.On grade B road with adhesion coefficient of 0.8,three different working conditions,fishhook,steering wheel angle step and double shifting line,are simulated.The results show that,compared with the passive stabilizer,the active stabilizer proposed in this paper can reduce the body roll angle,yaw rate,lateral acceleration and center of mass angle by(10~35)%,greatly improving the roll stability of the vehicle.